Re: [Elecraft] 40 M interference
W1TF continued: Thanks to K6DGW K6PJV, G3YMC, WB1HGA, K7UP, K6DGW and others that responded to my query. I suspect it is OTH radar, the suggestion of K6DGW. Do a Goggle search using oth radar, lots of interesting leads, including these: http://en.wikipedia.org/wiki/Over-the-horizon_radar http://www.agu.org/sci_soc/prrl/prrl9825.html This racket is not always on 7040 KHz, it varies but the spacing of signals seems to be 10.66 KHz. I now remember such signals back in the 60s and 70s. What you described is most likely _not_ OTHR. The OTHRs you will find in the ham bands (run by the British, the Australians, the Ukrainians, the Iranians the Chinese) blanket a portion of the band (some number of dozens of kcs) with a ticking sound - which is why when the Russians put theirs on the air back in the 70s it was called the woodpecker. If others are hearing it, likely to have been reported to IARU Region 2 Monitoring System - a good place to start if you think it is not some local thing: http://www.iaruregion2.org/ IARU Region 1 MS web page has sample recordings other resources that can help identify things we hear on the bands: http://www.iarums-r1.org/ There is a tremendous amount of use of amateur service spectrum contrary to provisions of the ITU - the R1 boys are very good at exposing just who is doing what... 73, VR2BrettGraham (450 km from Hainan woodpecker, heard world-wide on 40m). ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 40 M interference
Thanks to K6DGW K6PJV, G3YMC, WB1HGA, K7UP, K6DGW and others that responded to my query. I suspect it is OTH radar, the suggestion of K6DGW. Do a Goggle search using oth radar, lots of interesting leads, including these: http://en.wikipedia.org/wiki/Over-the-horizon_radar http://www.agu.org/sci_soc/prrl/prrl9825.html This racket is not always on 7040 KHz, it varies but the spacing of signals seems to be 10.66 KHz. I now remember such signals back in the 60s and 70s. I used to have a model 15 and did a lot of RTTY so I know what FSK sounds like. I still love my K1 but am thinking of building a K2 this summer. 73, Ty, W1TF, K1 #1423 __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 40 M interference
7040 KHz is one place for me to find new states or rag chews. Have noticed racket there sometimes. Tuned across the band and found this racket about every 10.66 KHz across all I can tune of 40 M (6998 - 7084) with my K1. 7040.6 KHz is the center of one signal. Seems to be about 1 KHz wide. Not there all the time. I do not hear it on 30 M. Does anyone know where this comes from and what it might be for and how often it is on? I always turn of my computer when using the radio to keep local noise down. 73, Ty, W1TF, Statham GA, 49 miles NE by E of Atlanta K1 #1423, BL2 Looking for earth-friendly autos? Browse Top Cars by Green Rating at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 40 M interference
Ralph Tyrrell wrote: 7040 KHz is one place for me to find new states or rag chews. Have noticed racket there sometimes. Tuned across the band and found this racket about every 10.66 KHz across all I can tune of 40 M (6998 - 7084) with my K1. 7040.6 KHz is the center of one signal. Seems to be about 1 KHz wide. Not there all the time. I do not hear it on 30 M. Does anyone know where this comes from and what it might be for and how often it is on? I always turn of my computer when using the radio to keep local noise down. what you are hearing my friend, could be Rtty Stations. Their calling frequency is at 7040, and has been for many years. Then I could be wrong ... Ron, wb1hga ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 40 M interference
Ralph Tyrrell wrote: 7040 KHz is one place for me to find new states or rag chews. Have noticed racket there sometimes. Tuned across the band and found this racket about every 10.66 KHz across all I can tune of 40 M (6998 - 7084) with my K1. 7040.6 KHz is the center of one signal. Seems to be about 1 KHz wide. Not there all the time. I do not hear it on 30 M. Does anyone know where this comes from and what it might be for and how often it is on? I always turn of my computer when using the radio to keep local noise down. Hi Ty, Not sure but you may be hearing the [or one of the] OTH radars, variously attributed to the Chinese, Australians, N. Korea [and us, of course -- maybe also the correct choice :-) ] Racket is the best description, and it/they do have some of the characteristics you describe. If you're old enough to remember LORAN A on what is now 160 and you lived near either of the coastlines then, you'll remember it. Various peaks as you tuned across and around it. I've heard it recently on 40m, a couple of days ago while trying to work N8S on 7005 up 5, but it moved up the band after a little while. There are frequent comments on the DX Spotting net about it too. Inasmuch as OTH tend to be national security-related, no one ever fesses up to them. Regards, Fred K6DGW - Northern California Contest Club - CU in the 2007 CQP Oct 6-7 - www.cqp.org ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
